Error while deploying WAR file

[aks_1]

i am trying to deploy a .war file on my local server using sun microsystem's application server. the problem i am having is when i try to launch it in the address bar as:
http://localhost:8080/HelloServlet/
it shows the directory listing for/ text on the screen.
but when i insert /hello ( "<url-pattern>/hello</url-pattern>") like this: http://localhost:8080/HelloServlet/hello,
shows error---
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Error allocating a servlet instance
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:189)
com.sun.enterprise.web.connector.grizzly.ProcessorTask.doProcess(ProcessorTask.java:604)
com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:475)
com.sun.enterprise.web.connector.grizzly.ReadTask.executeProcessorTask(ReadTask.java:371)
com.sun.enterprise.web.connector.grizzly.ReadTask.doTask(ReadTask.java:264)
com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:281)
com.sun.enterprise.web.connector.grizzly.WorkerThread.run(WorkerThread.java:83)

root cause

java.lang.UnsupportedClassVersionError: Bad version number in .class file
java.lang.ClassLoader.defineClass1(Native Method)
java.lang.ClassLoader.defineClass(ClassLoader.java:620)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1798)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:910)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1375)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1239)
org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:189)
com.sun.enterprise.web.connector.grizzly.ProcessorTask.doProcess(ProcessorTask.java:604)
com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:475)
com.sun.enterprise.web.connector.grizzly.ReadTask.executeProcessorTask(ReadTask.java:371)
com.sun.enterprise.web.connector.grizzly.ReadTask.doTask(ReadTask.java:264)
com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:281)
com.sun.enterprise.web.connector.grizzly.WorkerThread.run(WorkerThread.java:83)

note The full stack trace of the root cause is available in the Sun-Java-System/Application-Server logs.
===============================================
i guess the problem may be with web.xml file.
but could not figured it out.
any help would be appreciated.

[jwenting]

you guessed wrong.
You're trying to deploy a web application compiled with one version of the JDK to a server running a lower version.

[aks_1]

thanks for replying.
i don't get your point.
can you please elaborate further.

[jwenting]

no, if you don't understand that nothing I can tell you is going to make you understand.
You'd best just give up and go back to flipping burgers and filling shelves at the supermarket.

[aks_1]

thanks for the wonderful reply.
i would love do that anytime of the day.
but how will that going to solve my problem.

[jwenting]

see reply #1. If you can't understand that, learn English and/or see reply #3